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Recent Progress in Rapid Biosensor Fabrication Methods: Focus on Electrical Potential Application
Yoon Yejin,Kwon Yein,Park Hanbin,Lee Siyun,Park Chulhwan,Lee Taek 한국바이오칩학회 2024 BioChip Journal Vol.18 No.1
The coronavirus disease pandemic has led to an urgent need for rapid and accurate viral diagnosis. Therefore, rapid biosen- sors, not only for viruses but also for the detection of bacteria, disease diagnosis, and environmental monitoring, have been actively researched. Biosensors analyze the binding of biomolecules and target substances mainly based on electrochemical, electrical, or optical methods. To achieve precise and rapid diagnosis, it is crucial to reduce the time required for biomolecule– target substance binding. Typically, biomolecules reach the target substances through random diffusion, and to overcome the limitations associated herewith, biosensors have been integrated with alternating current (AC) electrokinetics (ACEK) technology. ACEK, through the application of alternating voltages, converts electrical energy into fluid motion, inducing pumping, mixing, concentration, and separation of the fluid. Its low power consumption makes it highly promising as a point-of-care diagnostic device. In this paper, we review the advancements in three ACEK technologies: AC electrothermal flow, AC electro-osmosis, and AC di-electrophoresis, to discuss the development of rapid biosensor fabrication methods based on electrical potential applications. The coronavirus disease pandemic has led to an urgent need for rapid and accurate viral diagnosis. Therefore, rapid biosen- sors, not only for viruses but also for the detection of bacteria, disease diagnosis, and environmental monitoring, have been actively researched. Biosensors analyze the binding of biomolecules and target substances mainly based on electrochemical, electrical, or optical methods. To achieve precise and rapid diagnosis, it is crucial to reduce the time required for biomolecule– target substance binding. Typically, biomolecules reach the target substances through random diffusion, and to overcome the limitations associated herewith, biosensors have been integrated with alternating current (AC) electrokinetics (ACEK) technology. ACEK, through the application of alternating voltages, converts electrical energy into fluid motion, inducing pumping, mixing, concentration, and separation of the fl uid. Its low power consumption makes it highly promising as a point-of-care diagnostic device. In this paper, we review the advancements in three ACEK technologies: AC electrothermal flow, AC electro-osmosis, and AC di-electrophoresis, to discuss the development of rapid biosensor fabrication methods based on electrical potential applications.
한국 성인의 인구사회학적 특성 및 생활습관에 따른 식생활지침 인식수준
윤예진(Yejin Yoon),김수현(Soo Hyun Kim),정효지(Hyojee Joung),안서은(Seoeun Ahn) 한국영양학회 2023 Journal of Nutrition and Health Vol.56 No.6
Purpose: This study aimed to investigate the perceptions of the dietary guidelines for Koreans (DGK) among Korean adults based on sociodemographic and lifestyle factors. Methods: A total of 514 Korean adults aged 19–64 years completed a self-administered online questionnaire assessing their perceptions of DGK, sociodemographic and lifestyle factors, and subjective assessments regarding the importance of 11 nutrients and 16 food groups. The differences in the perceptions of DGK according to the characteristics of the participants were analyzed using t-tests or ANOVA. Additionally, the differences in the subjective assessments of nutrients and food groups according to the perceptions of DGK were examined using t-tests. Results: The awareness of DGK was significantly higher among participants aged 50–64 years, living in single-person households, who were physically active, with a lower frequency of eating out, and with a higher interest in dietary information (p < 0.05 for all). The understanding of DGK was significantly higher among participants aged 19–29 years, females, individuals who were under or normal weight, non-smokers, those who selfevaluated their diet as healthy, and those with a high interest in dietary information (p < 0.05 for all). Additionally, the applicability of DGK was significantly higher among participants aged 50–64 years, who were physically active, who self-evaluated their diet as healthy, and who had a high interest in dietary information (p < 0.05 for all). Participants with a higher perception of DGK tended to attribute greater importance to most nutrients and food groups compared to those with a lower perception level. However, processed meat and foods, beverages, and alcoholic drinks consistently received lower importance ratings compared to other nutrients and food groups, regardless of the perception level. Conclusion: This research suggests that the perceptions of DGK among Korean adults may vary depending on sociodemographic and lifestyle factors. Consequently, there is a need to customize and diversify the methods for providing dietary guidelines.
Colored and semitransparent silver nanoparticle layers deposited by spin coating of silver nanoink
Yoon, Hoi Jin,Jo, Yejin,Jeong, Sunho,Lim, Jung Wook,Lee, Seung-Yun JAPAN SOCIETY OF APPLIED PHYSICS 2018 Applied physics express Vol.11 No.5
<P>In this letter, we report on the fabrication and characterization of colored and semitransparent silver nanoparticle layers. A spin coating of silver nanoink is used to deposit silver nanoparticle layers onto substrates. The transmittance and color of the silver nanoparticle layers are significantly dependent on the spin speed and nanoink concentration, owing to variations in the size and distribution of the nanoparticles. Both color variation and efficiency improvement are achieved with the application of silver nanoparticles to semitransparent Si thin-film solar cells, which is associated with the excitation of the dipole or quadruple plasmon modes of the silver nanoparticles. (C) 2018 The Japan Society of Applied Physics</P>
Yoon, Seokwon,Kim, Yejin,Ha, Wi-Ho,Jin, Young-Woo Ovid Technologies (Wolters Kluwer) - Lippincott Wi 2018 Health physics Vol.114 No.1
<P>Gross alpha/beta screening of urine samples was performed to evaluate internal contamination and dose assessment. Data on background radioactivity concentration were extracted by analyzing the urine samples of non-contaminated individuals who had visited a radiation effect medical clinic since 2012. Screening criteria were studied and established for radiation emergencies based on these results. In particular, pure beta-emitting radionuclides (H-3 and Sr-90) with a high dose conversion factor were considered to be the source of contamination. Moreover, the screening criteria for the general public were determined based on age groups. The liquid scintillation counting method was used for gross alpha/beta radiation counting. A standardized procedure of correction for chemical and color quenching was performed and validated. The gross beta counting method was validated by analyzing standard urine samples. The fluctuation of the screening criteria was large, based on the time elapsed after intake. A screening criterion of 150 Bq L-1 can be applied within 5 d after intake considering the minimum detectable activity. A standard screening criterion set to 250 Bq L-1 will be used as an important reference for decision making and additional monitoring. Although early evaluation and accurate identification of contaminated radionuclides is preferred, these relatively simple criteria were proposed to address radiation emergency situations involving several casualties.</P>
Perinatal maternal negative life events as risk factors of atopic dermatitis in female offspring
Yoon, Jisun,Kim, Eun Mi,Lee, Mi Young,Jung, Sungsu,Cho, Hyun-Ju,Kim, Yeongho,Choi, Yean Jung,Lee, Eun,Yang, Song-I,Lee, So-Yeon,Lee, Jeong Rim,Yi, Yejin,Hong, Soo-Jong Elsevier 2018 Annals of allergy, asthma, & immunology Vol.121 No.5